Question
Download Solution PDF30 किमी/तास वेगाने कार चालवत विनोद 5 मिनिट उशिराने त्याच्या ऑफिसला पोहोचतो. जर त्याचा वेग 40 किमी/तास असेल, तर तो ऑफिसला 3 मिनिट लवकर पोहोचतो. तर त्याचे निवासस्थान आणि ऑफिस यामधील अंतर शोधा.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिले आहे:
30 किमी/तास वेगाने कार चालवत विनोद 5 मिनिट उशिराने त्याच्या ऑफिसला पोहोचतो. जर त्याचा वेग 40 किमी/तास असेल, तर तो ऑफिसला 3 मिनिट लवकर पोहोचतो.
वापरलेले सूत्र:
वेळ = अंतर/वेग
गणना:
ऑफिसला पोहोचण्यासाठी लागणारा वेळ t मानूया
अंतर D मानूया.
30 किमी/ताशी वेळ
⇒ (t + 5)/60 = D/30 ----(1) (1 मिनिट= 1/60 तास)
40 किमी/ताशी वेळ
⇒ (t – 3)/60 = D/40 ----(2)
समीकरण (2) मधून समीकरण (1) वजा करूया
⇒ [t + 5 - (t - 3)]/60 = D/30 - D/40
⇒ (D/30) - (D/40) = 8/60
⇒ (4D - 3D)/120 = 8/60
⇒ D/120 = 8/60
⇒ D = 16 किमी
∴ पर्याय 1 हे योग्य उत्तर आहे.
Shortcut Trick
वेळेतील फरक = अंतर/वेग
8/60 = D/30 – D/40 (8 मिनिट = 8/60 तास)
⇒ D/120 = 8/60
D = 16 किमी
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